November 26, 1915.

THE COLLIERY GUARDIAN.

1105

Mining BOOKS

At Tremendous Reductions ! New Books at 25 per cent.
Discount! Books on Mining, Technical and all other Sub-
jects. Sent on Approval. State Wants. Send for Lists.
Books Purchased. W. & G. FOYLE, 121423, Charing
Cross Road, London, W.C.

OXYGEN.

The BRITISH OXYGEN Co. Ld.

The oldest and most extensive Oxygen producing
and distributing business in the World.

Factories in all industrial Centres equipped
with modern plants producing Oxygen of
unrivalled quality for use with RESCUE
APPARATUS.

ADDRESSES OF THE COMPANY’S WORKS :

LONDON ______ Elverton St., Westminster, S.W.

,,	______ Tunnel Avenue, East Greenwich,

BIRMINGHAM ... Saltley Works.	[S.E.

WOLVERHAMPTON Lower Walsall Street.
CARDIFF ______ East Moors.
MANCHESTER___ Great Marlborough Street.
BIRKENHEAD___ Bromborough Port.
SHEFFIELD ___ Celtic Works, Savile Street.
NEWCASTLE-ON-

TYNE ______ Walker Gate.

GLASGOW______ Rosehill Works, Polmadie.
SYDNEY ______ N.S.W.

rWOODITE

The best material for

Conical GAUGE GLASS RINGS

in all sizes and sections

For Valve*, Joint Rings, Pump
Cups, Ram Rings, Packing Rings,

Price Liat and full particulars on application to—

WOODITE CO., Mitcham Common, Surrey.

SPECIALTIES.

Rocker Bar Furnaces

.-,v For maximum efficiency with natural draught.

Twin-Door Furnace Fronts

.. . For large Boilers, side-firing, smoke-burning.

Sectional Back Bridges

New economic composite type; fusion^proof.

Tub-Controllers

For all sizes of tubs or tipping trucks. '

Wire Rope Cappels

The hew safety quick hosing system. .

Visual Signal Indicators

, : \ For all winding conditions.

J. & J. NEIL & CO., Engineers,
93, Hope Street, GLASGOW.



___________	______________________

_________________________________________

British Manufacture Best Quality at Lowest Prices
Every description either separate or in cases.

SPECIAL 12 in. CARDBOARD PROTRACTOR,
reading to i°, at 2s. 6d., postage Gd.

ILLUSTRATED catalogue on application.

WU UADI INMathematical Drawing and Surveying

■ n> nMnUliUj Instrument Manufacturer,

47, Finsbury Pavement, London, E.C.

Established 1851.	Factory—HACKNEY, E.

British Insulated & Helsby Cables Ld.,

ELECTRICAL CABLE MAKERS & ENGINEERS.

REGD. TRADE MARK.

Works: Prescot, Helsby, & Liverpool.

SEE LARGE ADVERTISEMENT EVERY FOURTH WEEK.





Elliptic Full-way Cock

(M. Allen’s Patent)	pj

costs no more than an elongated-
way cock, and is equal in service
to a round-way full-bore cock.

W. H. WILLCOX & CO. LTD., 32 to 38, Southwark Street, London.

CLEAR-FLOW
BORE.”

Write
TO-DAY
for detailed
particulars
and
prices.

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Semet-Solvay Coke Ovens

SECTION OF OVEN

SHOVING SOLID CONSTRUCTION.

Strongest in Design.
Separate sets of flues to each oven.
Very low Maintenance Cost.

________________________________________

“DIRECT” AMMONIA RECOVERY PLANT,
giving increased yield of Sulphate, with less
Labour, and a saving in Steam consumption.

THE COKE OVEN CONSTRUCTION CO. L!

Howard Chambers, 155, Norfolk Street, SHEFFIELD.